Coal Bunker in the Coal-Fired Power Plant
Hard coal (anthracite) or brown coal is the main energy source in coal-fired power plants. In some plants, more than 1000 tons are burned every day in the boiler. The coal is delivered by ship or train. At the loading stations, the coal is frequently stored in coal bunkers up to 100 ft (30 m) high. The coal is then transported from these bunkers via above- or below-ground conveyor belts to the power plant coal yard. Further conveyor belts feed the coal, often via intermediate bunkers, to beater mills in which the coal is ground into fine dust.
Level Measurement in the Coal Bunker with the VEGAPULS 68
In places where it is really dusty and the non-contact measurement technique holds up for a long time, the radar sensor VEGAPULS 68 is the right choice. Specially developed for bulk solids, it offers all the advantages of non-contact filling level measurement. The VEGAPULS 68 measures the filling level reliably even under conditions of extreme dust generation. Depending on the size and number of loading points, several VEGAPULS 68 sensors may be in use.
Overfill Protection with the VEGACAP 65
Ruggedness is a critical factor in the coal bunker. This is why the capacitive measuring technique lends itself well to overfill protection. The VEGACAP 65 stands out due to its stable, insensitive mechanical construction and easy setup. Neither condensate nor buildup can compromise its reliability in protecting against overfilling.
Additive Fuels Meat-and-Bone Meal and Sludge
Whether in coal power plants or in waste incineration plants, meat-and-bone meal and dried sludge are an integral part of electricity and district heat generation. Approximately 5% meat-and-bone meal and approximately 2% dried sludge are added to the coal dust. These additive fuels are stored in silos.
VEGAFLEX 82 for Level Measurement of Additive Fuels
The robust construction of the VEGAFLEX 82, which can handle tractive forces up to three tons, makes possible its use for additive fuels in containers and silos up to 130 ft (40 m) high. Being completely insensitive to buildup and intense dust generation, the VEGAFLEX 82 is the ideal sensor for continuous filling level measurement. Because the instrument is already calibrated to the sensor length at the factory, on-site adjustment is not necessary.
VEGAVIB 62 for Level Detection
The VEGAVIB 62 is implemented for level limitation in the meat-and-bone meal silo. This overfill protector with suspension cable extension renders dependable service in this application.
VEGAVIB 61 as Minimum Level Detector
The VEGAVIB 61 is installed laterally and used as empty detector in the meat-and-bone meal silo. In the conveying process, it also takes on an important role as backup detector at the transfer station.